exp/locale/collate/tools/colcmp: add locale to output of regression failure.
exp/locale/collate/tools/colcmp: add locale to output of regression failure.

R=r
CC=golang-dev
http://codereview.appspot.com/6749058

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang